Work complete! While taking much (100-200 hours?) longer than I originally expected, I really enjoyed the project. I've learned a bit more about my vallejo paint. I struggled with first coat coverage, but I also ended up painting from black and brown basecoats. I will probably go back to some citadel foundations to round out my earlier paint coverage stages on darker models from now on.
I also learned to make a paint chart of all my mixes and washes used. This helped greatly when coming back to work on it after a week, to maintain a uniformity in style. These will get passed on to Rebornflames, to help act as a template towards any new units that might get painted up in the army. I will be doing this with every project from now on.